Moisture-proof package.



No. 881,561. 1 PATENTED MAR. .10, 190s.

H. G.. EGKSTBIN.

. MOISTURE vPROOF PACKAGE.

APPLIOATION FILED DEU. 6 1904.

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UNITED PATENT OF CHICAGO, "ILLINOIS, AYCORPORATION vOF WEST VIRGINIA MoIs'rURE-Prtoor1 PACKAGE.

To all 'whom it 'may concern: f

Be it known that I, HENRY G. EoKs'rEiN, a citizen of the United States; and a resident of ,(hicago, county of. Cook, and State of Illinois, haveinvented certain new and use. full Improvements in Moisture-Proof Pack-l ages, of which the following is declared to be fapfull, clear, and exact description.

The invention relates to 'paper packages .or cartonsffor` marketing candles, lpop-corn, coffee, tea, shelled peanuts or other similar goods or merchandise which deteriorate and become stale on exposure to the air.

' folds abnot be glued tight other sealing medium and the package is not l air-tight or impervious to atmospheric moisture and will not prevent the deterioration of j improvement'is set forth in the followinfr deygoods for more than a few days, particularly if themerchandiseffor which the package is employed, `is\ like candied pop-corn, for example, very susceptible to the deleterious effects of moisture:

The present invention seeks to provide a moisture-proof paper package whichnis effectively sealed so as to be air and molsture tight at all points. The exact nature of the scrption and more particularly pointed) out in t e appended claims..

As above stated, aper water roofed withv wax cannot be satis actorily sea ed. with glue or other cement and I have been unable to find any satisfactory method of sealing the ordinary waxed paper now .on the market,`

which usually has 1() to 25 percent. wax. I

i -have found however, thatia wrapperA of flexible paper supersaturated with-wax, sayl from 45 to 55 percent. of the total weight and having a heavy surface coat, when folded'about and held in sha e by an inner wrapper, box

or carton of sti paper or other suitable material, may be satisfactorily sealed at all points to render the aper package' air and moisture tight throng aid of the contained Specioationlof Letters Patent.` l Application'mea December e, 1904. serian No.' 235,706.'

Patented lllllarch- 10, i908.

wax, by first #heating 'the folded iiexible wrapper to melt or partially-melt the wax -along the-folded portions, and pressing the folds into close contact at all points and permittlngthe `wax-t0 cool and set.y L

`T he accompanying drawing illustrates the inven-y s tyleof paper package toV which the tlon is moreparticularl'y directed.

Figure l is a perspectiveview of the inne;I

supporting wrapper o r carton of stiff aper or paper 'box-board, with its termina end receive the char e of candy, candied pop.- corn or other sma l merchandise.

-flaps extended or in unfolded' condition vto- Fig. 2 is a l -perspective view of the same with its end A iiaps folded or closed. Fi 3 is a perspective view showing 'the ilexi'b e waxed wrapper folded and sealed about the inner carton. Fig. 4 is a sectional view of the completed package.

` The inner Wrappermay be lof any form suitable tocontam the goods forv whlch the package is designedbut should be of regular' orm and made of stili material such asv paper box-board and have foldable portions or the 4like which may beo ened lto receive the charge and then folde entirely close the same and resent comor shut'up t0v paratively rigidsides and en s to properly i support the outer sealing wrapper of flexible waxed paper and hold it in sha e.

In 'the form illustrated, the mm1-Wm pel; or .carton 'a is preferably of stffpa, er. 0X- f board formed by cutting the paper s eet into suitable blanks which are scored to for-m the` corner folds and out to formthe foldable end flapsI b. Preferably also, as in' the form shown, the side edges of the blank areoverlapped and glued togethern at c, to form a -tight\`"s"eam lengthwise Vofr t 1 the' terminal flaps at 'each end beyond the seam are free to be foldeddown upon each been placed within the carton,.as shownin Fig. 2. Preferably also, the inner Wra' per ma be coated or impregnated throng Iout vwit heavy stock, it may hold a large amount of the wax and thus aid in rendering the package moisture-proof. Without the outer sealing wrapper, such vawaterproofed carton I have found, constitutes a very satisfactory ackage, and forms. the subiect-matter of lletters Patent ofthe -United States No.

r(97,504, issued to me August 15, 1905, but

e carton, while other. after the charge of merchandise hasi wax and, since the inner vcarton'is of l iiaps are stid and unyielding and cannot `be pressed into close 'contact at all points.i

The outer sealing wrapper d in 'the form of Va sheet of suitable size is supersaturated with wax, that is to say, is not onlyr impregnated throughoutwith wax but has a hea surface coat sufficient-to seal the'folded portions when heated. The waxed sealing wrapper is tightly folded about lthe inner closed carton containingthe merchandise, as indicated in Fig. 3. It is then heated to melt or partially. melt the wax along the overla pecl portions e and at the end-'folds f, Van the overlapped and folded portions are then pressed into close Contact atall points and the melted Wax allowed t'ofset.4 Since the outerv Wrapper is of flexible pager', its folds may be readily pressed into c ose contact over the entire lapped portions thereof and eectively sealed by the melted wax.A

The inner carton or wrapper, as stated, is

`of regular form and is stiff and comparatively unyielding and serves as'. a firm support to hold the outer flexible wrapper in shape, and serves as foundation with flatsmooth surfaces upon which 'the' sealing Wracpper may be smoothly and snugly folded an its over-- lapped portions smoothly'and tightly pressed into contact when sealing the same by aid of Y the melted wax.

`As stated, ordinary waxed paper containi ing only l10 to 25 percent. of weight of wax Y applied to theflexible paper sheet by di ping the latter in'a bath of melted -Wax unti it is supersaturated, that is to say, not only impregnated throughout but has a heavy wax coating, then withdrawing the sheet and allowing the wax to cool or set without squeezing or draining off the surplus. Refined paraffin wax melting at e. g. 130 to 135 F.

1s preferably employed and the bath is malntained at a temperature of from 180o to 200" F. These details of course are given fonly for guidance and may be.' widelyT varied 'in accordance with the different paper stocks employed. The desire is to obtain a paper having a very high percentage of 'wax to 'thoroughly protect the contents of the package and so that sufficient Wax is present as a.

heavy surface coat to properly seal the folds at all points.

While it is eminently preferable that the flexible sealing `wrapper should be supersaturated with wax as above described, the wax necessary for the sealing may be provided as la heavy coat applied to the surface of the paper. The heating and scaling of the waxed wrapper may be performed in any suitable manner as' by holding the package over a flame or before a hot blast and then pressing the folds snugly into contact with the fingers or by other ksuitable means. A package thus formed is moisture-proof and practicallyair-tight at all points, and has een found to preserve intact for months in an atmosphere saturated with moisture, such goods as candied op-corn,wh1ch 1s very susceptible to the de eterious effects of moisture. Preferably, the package sealed as above described, is inclosed in an outer protecting wrapper g of heavy paper of suitable shape and having, like the inner wrapper, terminal naps which are folded and glued or otherwise cemented together. The outer rotecting Wrapper prevents injury to the Sea ing wrapper and may bear advertising or other printiing matter to indicate the nature of the contained goods.

Obviously, the package may be formed by aid of any suitable means, andordinary stili and flexible papers may be employed respectively for the inner supporting cartonrand the iiexible sealing wrapper. The details set forth of waxing the latter and the percentage of wax, is given for guidance only and may Having described my invention, what I` claim as new and desire to secure by Letters Patent is 1 1. A moisture-tight package for candies and like merchandise, comprising an inner wrapper or carton of stiff pa er board and of regular form having foldab e flap portions, which may be opened to receive the charge and folded to completely inclose the same, and an outer wrapper of flexible paper supersa-turated with wax and sealed at its overlapping folded portions through aid of. the contained Wax, substantially as described.

2. A moisture-tight package for candies and like merchandise comprising an inner box of regular form and of stiff, rigid material, having means which may be opened to receive the charge and closed to completely surround the same, and an outer wrapper of flexible, heavily waxed' paper, folded about the inner box and sealed around its 'overlapped portions through aid of the contained wax, substantially as described.

HENRY G. ECKSTEIN. 

